Update _app.js

Author: ZeroCho

ch4/front/pages/_app.js

@@ -1,7 +1,6 @@
 import React from 'react';
 import Head from 'next/head';
 import PropTypes from 'prop-types';
-import withReduxSaga from 'next-redux-saga';
 import 'antd/dist/antd.css';
 
 import wrapper from '../store/configureStore';
@@ -23,4 +22,4 @@ export function reportWebVitals(metric) {
   console.log(metric);
 }
 
-export default wrapper.withRedux(withReduxSaga(NodeBird));
+export default wrapper.withRedux(NodeBird);